Open the media file that you wish to locate metadata information for in your favorite media player.
Locate the music library within your media player. The music library houses all of your music files. If the MP3 is not located in your music library drag it into your program to copy it to your music player.
Click on the MP3 file that you would like to identify. In iTunes and Windows Media player there is a "Get Info" or similar option. Select this option and you will be able to see and edit all of the metadata information.